When comparing StarUML vs yEd, the Slant community recommends yEd for most people. In the question“What are the best flowchart / diagram softwares?” yEd is ranked 4th while StarUML is ranked 36th. The most important reason people chose yEd is:
With automatic layout you get great looking diagrams with very little effort. yEd has the most versatile and most complete collection of automatic layout algorithms.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Automatic Layout
With automatic layout you get great looking diagrams with very little effort. yEd has the most versatile and most complete collection of automatic layout algorithms.
Pro Completely free
Pro Multi-platform
Runs on Windows, Linux and Mac OSX. There also is a Web application.
Cons
Con Based on Electron (HTML/CSS/JS)
The interface is not native. The looks are okay, but the responsiveness is awful sometimes.
Con Clumsy UI
Con Not free-as-in-freedom
Not released under an open-source license.